Please do NOT post your initial report in this forum.
Please post your report in the relevant Fair Play forum on gamereplays. The staff in each section are specialists in their respective games and have the tools to deal with the different issues and scenarios that can arise from game to game. If your report has merit, the Gamereplays staff will post in this forum for you. If you are not a gamereplays member, joining the site is free. If you cannot access your gamereplays account or are unable to join (for example because you are a banned member) please let us know and we will make alternative arrangements for you. Here are the forums you need:
C&C Generals Cheat Accusations
Zero Hour Cheat Accusations
C&C 3 Fair Play Forum
Kane's Wrath Fair Play Forum
Red Alert 3 Fair Play Forum
In each case, please make a new topic for your report. In most cases, your report will be invisible until the staff have looked at it. You will almost always need a replay of the game in question to go with your report. If you are reporting a disconnect or desync (miss-match), you will also need a screen shot of the disconnect or desync screen and probably evidence of anything said by the accused player in the game chat.